Pulse profiles of all available XMM-Newton and NuSTAR observations, folded on the respective measured pulse period. The profiles are repeated once for clarity and phase-aligned by hand to have the minimum at phase 0. For epochs where XMM-Newton and NuSTAR observations where taken simultaneously, NuSTAR is shown in blue using the right-hand y-scale. Each panel is labeled with the epoch name, pulse period, and measured pulsed fraction in percent. For details see text.